XML 164 R137.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Capital Management - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of capital management [abstract] |  |
Net debt ratio | 2.42 | 1.16

X
- Definition Disclosure of capital management. + References No definition available. + Details
Name: | stn_DisclosureOfCapitalManagementAbstract
Namespace Prefix: | stn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net debt to EBITDA ratio. + References No definition available. + Details
Name: | stn_NetDebtToEBITDARatio
Namespace Prefix: | stn_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration